ts-morph-deadcode-remover.js

// npm i ts-morph

const SOURCE_PATH = '/src/';
const TS_CONFIG_PATH = './tsconfig.json';

const { Project, Node } = require('ts-morph');

async function main() {

  const project = new Project({ tsConfigFilePath: TS_CONFIG_PATH });

  project.getSourceFiles().forEach(file => {
    if (!file.getFilePath().includes(SOURCE_PATH)) {
      return
    }
    console.log(file.getFilePath());

    file.getStatements().forEach((statement) => {
      if (!Node.isExportable(statement) || !Node.isReferenceFindable(statement)) {
        return;
      }

      const anyExternalReference = statement.findReferencesAsNodes().find((ref) => ref.getSourceFile() !== file);

      if (anyExternalReference) return;
      statement.setIsExported(false);
    });

    file.fixUnusedIdentifiers();
  });

  console.info('saving project...');
  await project.save()
}

main()